Izvorni znanstveni članak

Analysing laboratory results for transformer oil breakdown voltage

Anatoliy Mudryk
Marco Tozzi
Nathan Jacob
Viktor Berezhny

Sažetak

The article proposes a method to interpret the results of the Breakdown Voltage (BDV) test performed on transformer mineral oil, which is highly influenced by the relative humidity of the oil sample. Generally, the temperature of the oil at the moment of sampling is different from that at the moment the test is performed in the laboratory. While this temperature difference does not affect the absolute amount of water (ppm) in the oil sample, relative humidity is affected, and, as a result, the final BDV result is affected, producing misleading results. In this article, a
method to incorporate the water content and the oil sampling temperature is proposed in order to improve the interpretation of the results and avoid false diagnostic oil condition assessments. The method results have been validated by multiple testing laboratories and by using real field data.

Ključne riječi

dielectric breakdown voltage, relative humidity, water, temperature, mineral oil

Hrčak ID:

307236

URI

https://hrcak.srce.hr/307236

Datum izdavanja:

16.7.2023.

Posjeta: 235 *